Hypothesis in a Science Fair Project

What do you think may be the answer to your
question? The hypothesis is the possible answer you
will try to prove or disprove.

Examples:

Are rocks classified according to hardness, color, density?

Do pillbugs prefer moist surroundings?

Are people's left and right feet the same size?

Does the moon always rise at the same time?

Do all fluids weigh the same?

How much salt will dissolve in a cup of water- and what about
sugar?

How do matches work?

If you get this far
and realize your question cannot be answered by the scientific
method, return to step 2 and figure out whether any part of your
question involves something which can be measured. If not, it is a
question science can't answer. If yes, rephrase your question
accordingly and continue.